SQL_Handler.py 文件源码

def connectToDatabase(db, user, psswrd, host):
    try:
        global conn
        conn = pymysql.connect(
            db=db,
            user=user,
            passwd=psswrd,
            host=host
        )
        global data
        data = getAndSetData(conn)
        return conn, data
    except pymysql.err.OperationalError:
        Q = QMessageBox()
        Q = QMessageBox.information(Q, 'Error', 'Your username and/or password was incorrect. Please try again.', QMessageBox.Ok)
        return None, None